If you draw a useful but safe tile (let's say a

), would you defend and discard it, or go on and trying to win? I am far from winning, and the hand isn't so big (riichi, tanyo, pinfu... that's 3900, and pinfu could be difficult because I dropped

; and if I use the

set, I lose pinfu, so 2600, barring ippatsu, tsumo and/or uradora), so I'd think about defending.